Stacked plate heat exchanger

A stacked-plate heat exchanger, comprising:

• a plurality of heat exchanger plates;
• and
• an embossed partition separating the heat exchanger plates into a high-temperature coolant circuit through which a first coolant is flowable, and a low temperature coolant circuit through which a second coolant is flowable;
• wherein the heat exchanger plates are stacked one on another, and the first and second coolants flowing through the heat exchanger plates on one side, and a medium to be cooled flows through the heat exchanger plates on another side;
• wherein the heat exchanger plates each has a circumferentially positioned edge via which each heat exchanger plate is soldered to an adjacent heat exchanger plate, wherein the partition is connected to each edge on a longitudinal end side.